package com.maple.utils.widget.glide

import android.content.Context
import android.widget.ImageView
import com.bumptech.glide.Glide
import com.bumptech.glide.load.resource.bitmap.CenterCrop
import com.bumptech.glide.load.resource.bitmap.RoundedCorners
import com.luck.picture.lib.engine.ImageEngine
import com.luck.picture.lib.utils.ActivityCompatHelper

class GlideEngine: ImageEngine{

    /**
     * 加载图片
     *
     * @param context   上下文
     * @param url       资源url
     * @param imageView 图片承载控件
     */
    override fun loadImage(context: Context?, url: String?, imageView: ImageView?) {
        if (!ActivityCompatHelper.assertValidRequest(context)) {
            return
        }
        if(context == null || imageView == null) {
            return
        }
        Glide.with(context)
            .load(url)
            .into(imageView)
    }

    override fun loadImage(
        context: Context?,
        imageView: ImageView?,
        url: String?,
        maxWidth: Int,
        maxHeight: Int
    ) {
        if (!ActivityCompatHelper.assertValidRequest(context)) {
            return
        }
        if(context == null || imageView == null) {
            return
        }
        Glide.with(context)
            .load(url)
            .override(maxWidth, maxHeight)
            .into(imageView)
    }

    /**
     * 加载相册目录封面
     *
     * @param context   上下文
     * @param url       图片路径
     * @param imageView 承载图片ImageView
     */
    override fun loadAlbumCover(context: Context?, url: String?, imageView: ImageView?) {
        if (!ActivityCompatHelper.assertValidRequest(context)) {
            return
        }
        if(context == null || imageView == null) {
            return
        }
        Glide.with(context)
            .asBitmap()
            .load(url)
            .override(180, 180)
            .sizeMultiplier(0.5f)
            .transform(CenterCrop(), RoundedCorners(8))
            .placeholder(com.maple.res.R.drawable.ic_default_placeholder)
            .into(imageView)

    }


    /**
     * 加载图片列表图片
     *
     * @param context   上下文
     * @param url       图片路径
     * @param imageView 承载图片ImageView
     */
    override fun loadGridImage(context: Context?, url: String?, imageView: ImageView?) {
        if (!ActivityCompatHelper.assertValidRequest(context)) {
            return
        }
        if(context == null || imageView == null){
            return
        }
        Glide.with(context)
            .load(url)
            .override(200, 200)
            .centerCrop()
            .placeholder(com.maple.res.R.drawable.ic_default_placeholder)
            .into(imageView)
    }

    override fun pauseRequests(context: Context?) {
        if (!ActivityCompatHelper.assertValidRequest(context)) {
            return
        }
        if(context == null) return
        Glide.with(context).pauseRequests()
    }

    override fun resumeRequests(context: Context?) {
        if (!ActivityCompatHelper.assertValidRequest(context)) {
            return
        }
        if(context == null) return
        Glide.with(context).resumeRequests()
    }

    private object InstanceHolder {
        val instance = GlideEngine()
    }

    fun createGlideEngine(): GlideEngine {
        return InstanceHolder.instance
    }
}